They are depicted as fully red-skinned humanoid creatures with medium length tails,horns, pointy ears, and wings.
It is possible that a magic spell book summons them.
A sculpture of one is seen in a behind the scenes photo. One can be seen jumping on a facility worker through a blood-drenched camera on one of the monitors.
Demons are one of the oldest known antagonists in mythology, literature and modern media. They have their origins in the ancient legends of Persia and the stories of Ormazd, the god of creation, who fought Ahriman, the god of evil and prototype of the Biblical Devil. Later cultures such as the Babylonians and Hittites later adopted characteristics of ancient demons to apply to evil gods, such as Baal. In the horror genre, demons typically have a physical presence, usually a body of their own or a form claimed via possession of living things, mostly mortals.
In literature and movies, demons are usually represented in one of three forms. One is that of very ancient beings forgotten on Earth, such as the those in the Chthulu Mythos. The second type are evil gods from ancient mythology, such as Baal or Pazuzu, and are usually assisted by hordes of lesser demons or goblins. The third type are the evil spirits of human beings who continue to exist by feasting on the souls of the living, such as Freddie Krueger from the "Nightmare on Elm Street" franchise.
Some examples in TV and film include:
- Demons by Dario Argento, in which they are fast and vicious with long nails and long splayed teeth for tearing flesh.
- Night of the Demons
- demons from this is the end the demons in Charmed or in Buffy the Vampire Slayer.